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Won’t allow me to open previous tabs on start up

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Latest update Firefox Version 134.0 (64-bit): Won’t allow me to open previous tabs on start up. When I try to change setting it says this:

Information Your browser is being managed by your organization.

How do I fix this? I am the organization and this setting was previously working for years???

Latest update Firefox Version 134.0 (64-bit): Won’t allow me to open previous tabs on start up. When I try to change setting it says this: Information Your browser is being managed by your organization. How do I fix this? I am the organization and this setting was previously working for years???

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What OS? If windows, what security software are your running?

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